Why doesnt www. work?

When I enter www.newschoolers.com into the address bar I get the whole newschoolers is getting fancier thing but when i do anything else such as m.newschoolers.com or asf.newschoolers.com (anything but www. ) I can use the website. Why is it like this?

"I just grab whatever part of the ski I see first then let my friends claim it" -nickyp